38718449945 has 16 divisors (see below), whose sum is σ = 55894304640. Its totient is φ = 25152436224.

The previous prime is 38718449921. The next prime is 38718449963. The reversal of 38718449945 is 54994481783.

It is a cyclic number.

It is not a de Polignac number, because 38718449945 - 2¹⁴ = 38718433561 is a prime.

It is a super-2 number, since 2×38718449945² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29110952 + ... + 29112281.

It is an arithmetic number, because the mean of its divisors is an integer number (3493394040).

Almost surely, 2^38718449945 is an apocalyptic number.

38718449945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38718449945 is a deficient number, since it is larger than the sum of its proper divisors (17175854695).

38718449945 is a wasteful number, since it uses less digits than its factorization.

38718449945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58223264.

The product of its digits is 34836480, while the sum is 62.

The spelling of 38718449945 in words is "thirty-eight billion, seven hundred eighteen million, four hundred forty-nine thousand, nine hundred forty-five".